92 BULLETIN OF THE BUREAU OF FISHERIES. 
MEASUREMENTS OF SPECIMENS OF RUTILUS OREGONENSIS FROM ISOLATED BASINS OF THE OREGON 
Lake System—Continued. 
From Warner Creek, Warner Lake—Continued. 
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Length of body. 64 91 75 75 87 75 81) 81 89 80 89 92 
Length head..... - 380 -27| .29)'.30 | .275 | .28 | .28 | .29 28 285 | .28 29 
Snout to occiput. +23 ~21 | .22 |) .235) .21 | .21 | 222 | .22 225 | .226 | .215 22 
Snouwt to dorsall’s.---2" 3-2. ----|| 300 55 | .o7 | .57 | -65 |.58 | .60 | .58 59 57 | «57 575 
Snout to ventral. | .55 |] .57 |) .56 | .55 | .575 | .575 | .57 | 58 56 | 157 565 
Depthibodya-eeecee er onset 27 |) S27) S30 528) |S 2Telmar on oon mean 29 285 | .255 27 
Depth caudal peduncle.-........... 13 +13) .13|.13 | .12 | .135 |) .12 | .13 |. 13 12 | .12 13 
Meng thisnout seen ses esneesere aoe -085 | .08] .08|.09 | .075|.08 | .08 | .09 |. | .085 | .09 | .08 085 
Length maxillary. . -085 | .08} .08| .08 | .075 | .085 | .08 | .09 | .09 08 | .08 08 
Diameter eye. -.-.-.-- | =07) 183065) (07, 107 | (0600/5065 | 0607, 06 07 ~+| .06 06 
Interorbital width................. -10 -09 | .10) .09 | .085 | .095 | .08 | .095 095 | .095 | .095 095 
Height) dorsals seg eo. cee sees eee 22 ~22)| .22') .20) | .19 |: iy Waly! cals) 4) 6 20 | .20 || .19 . 20 
Meighan lepers sess -18 SLA) eerie leno ely | roel 4h elem | eel ele -155 | .15 | £15 15 
Length) pectoral’: 22222 222222225 2: -21 -21| .20 | .20 | .16 | 17 | .165 | .16 S1SH |) ol Sie eli 175 
Wengthyentrals = 22 ---eeeee eee -175 | .18) .17 | .165} .145 | .16 | .145| .14 | 155 | .155 | .15 165 
Meng thicaudal= eis sees eee nee -29 | .29) .28/.25 | .25 | .26 | .255 | .25 27. || 28) |te2o) 26 
Scales lateral line.............. 2 50} 52 53 56 54 49) 56 55 AGS eero 2 mento) 52 
Scales above lateral line 12 12 11 13 13 12 12 13 12 12} 12 13 
Scales below lateral line a 6 6 7 8 | 7 7 ul 7 7 Ce ee 7 
Scales before dorsal..........- | 27 30 29 30] 27 30 28 27 27 30 29 29 
DorsalliTay 82 ee. ceases eee 5 8 8 8 8 | 9 9 9 9 9 | 8 | 8 8 
Mpa ITVS case fe eee eee a Ol ele sl Bl Bl) tal s Bh ei) 8 8 
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Rutilus columbianus, new species. 
Closely related to R. oregonensis, R. thalassinus, and R. bicolor, from each of which it differs as follows: 
From R. oregonensis in having larger scales; from A. thalassinus in its shorter fins, fewer scales in the 
lateral series, and a larger number between occiput and dorsal fin; from R. bicolor in having a larger 
Fic. 4.—Rutilus columbianus, new species. Type. 
head, higher anal, longer caudal, fewer scales in the lateral line, a larger number between occiput 
and dorsal fin, and in usually having one more ray in the dorsal fin. The tabulation on page 94 
will show some of the distinctive characters of these forms in greater detail. 
Description of type no. 55595, U. 8. National Museum, from Warm Springs, near Harney Lake, 
Harney County, Oreg.: Total length, 186mm. Head, 3.7 in length to base of caudal; depth, 3.6; depth 
caudal peduncle, 8.4; depth head at occiput, 4.7; length snout, 3.5 in head; maxillary, 3.5; diameter 
eye, 5.6; width space between eyes, 3.1; height dorsal, 1.6; anal, 2.1; length pectoral, 1.7; ventral, 1.9; 
caudal, 1.2; scales, 12-49-7; between occiput and origin of dorsal, 27. 
Dorsal contour with an abrupt elevation at occiput, which is less prominent in young individuals; 
mouth very oblique, maxillary extending to a vertical passing midway between nostril and eye; lower 
